Animal Science & Calculation Guides
Clear, practical guides explaining the real science behind daily pet feeding, animal health, weight management, and livestock care.
How to Use These Guides
We believe animal care math should be transparent and easy to understand. Rather than treating formulas as black boxes, our guides explain the exact steps behind everyday calculations. Learn how to calculate daily calories for a 15 kg (33 lb) dog, read a hands-on cat body condition chart, balance aquarium water volume, safely measure a horse's weight with a tape measure, or figure out feed costs for your chicken flock. Each guide includes worked numerical examples, normal healthy ranges, and actionable veterinary tips.
How to Calculate Dog Calories: The Complete Veterinary Guide to RER & MER
Learn the exact veterinary formulas behind dog resting energy (RER) and daily meals (MER), and how to calculate healthy daily feeding amounts.
Understanding Broiler FCR & EPEF: The Poultry Farmer's Calculation Handbook
A comprehensive technical breakdown of Feed Conversion Ratio (FCR), European Production Efficiency Factor (EPEF), and flock performance benchmarking.
How to Estimate Horse Weight Without a Scale: Heart Girth & Length Equations
Master the heart girth and body length equations to calculate accurate horse body weight with a tape measure for deworming, feed rations, and medication.
Chocolate Safety for Dogs: What Every Owner Should Know
Learn how to assess chocolate toxicity risk in dogs based on weight, theobromine dose, and chocolate type. Practical safety and veterinary guidance.
How Many Calories Does My Dog Need Each Day?
Calculate your dog daily caloric requirements using veterinary RER and MER equations. Understand feeding factors, life stages, and portion control.
Understanding Your Dog's Age in Human Years
Discover the real science of dog age conversion using UC San Diego epigenetic research. Move beyond the 7-year myth to accurate life stage tracking.
How Much Should I Feed My Dog? A Practical Daily Feeding Guide
A complete guide to portioning dog food accurately by calories and weight. Learn how to weigh portions, split meals, and avoid overfeeding.
Raw Dog Food Portions: The BARF Diet Guide for Beginners
Master raw dog food portions with the 80/10/10 BARF diet. Calculate muscle meat, bone, organ, and vegetable requirements for a balanced raw diet.
Grapes and Dogs: Understanding the Risks
Understand the risks of grapes and raisins for dogs, acute kidney injury factors, and essential steps to take if accidental ingestion occurs.
Is My Dog a Healthy Weight? Using the Body Condition Score
Learn how to evaluate your dog body condition score (BCS 1-9), feel ribs properly, spot ideal silhouettes, and calculate target healthy weight.
Is My Cat a Healthy Weight? Body Condition Score Explained
Evaluate your cat body condition score (BCS 1-9) with our veterinary guide. Identify overweight risks, check silhouettes, and manage safe weight loss.
How to Estimate Cattle Weight Without a Scale
Estimate cattle and calf live weight accurately without livestock scales using heart girth and body length tape measurements and the Shaeffer formula.
How Old Is My Cat in Human Years? The Complete Cat Age Guide
Find your cat's exact age in human years using the AAFP feline life stage curve. Step-by-step conversion chart from kitten months to senior feline care.
How Much Should I Feed My Cat? Daily Portions Explained
Find out how much food your cat needs each day based on their weight, life stage, and diet type. Covers both wet and dry food portions with practical feeding guidance.
Understanding Your Dog's Heat Cycle: Signs, Stages & Timing
Learn about the four stages of your dog's heat cycle, what signs to look for, how long each stage lasts, and how to calculate the fertile window for responsible breeding or prevention.
Horse Pregnancy & Foaling: Due Date Calendar, Signs & What to Expect
A practical foaling calendar guide for horse owners. Calculate your mare's due date, understand the 3 stages of labor, watch for waxing, and know the 1-2-3 post-foaling rule.
How Much Hay Does a Horse Need? Daily Feed & Forage Guide
Calculate exact daily hay rations for your horse by body weight and workload. Learn how many flakes to feed, how to weigh bales, and how to prevent colic and gastric ulcers.
Hen-Day Egg Production: Calculation Guide & Why Chickens Stop Laying
Learn how to calculate Hen-Day Egg Production % for backyard or commercial flocks. Understand breed benchmarks, seasonal laying curves, and how to fix sudden egg drops.
Rabbit Feeding & Hay Portions: Daily Guide to Prevent GI Stasis
Master the 80/10/5 rabbit diet. Calculate exact daily hay, leafy green, and pellet portions to prevent life-threatening gastrointestinal (GI) stasis and dental spurs.
Aquarium Size, Water Weight & Fish Stocking: The Safe Tank Guide
Calculate actual aquarium water volume, structural floor load weight (1.0 kg/L / 8.34 lbs/gal), and safe fish stocking limits. Move beyond the flawed 1-inch-per-gallon myth.
Lilies and Cats: True Lily Toxicity, Warning Signs & Emergency Care
Every part of a true lily is lethal to cats. Learn to distinguish deadly True Lilies (Lilium/Hemerocallis) from peace lilies, recognize early symptoms, and act fast.
Dog Pregnancy Guide: Week-by-Week Development & Whelping Timeline
A comprehensive, veterinary-backed developmental calendar tracking dog pregnancy from day 1 mating through 63-day whelping and labor care.
How Big Will My Puppy Get? The Complete Growth Chart & Weight Guide
A comprehensive veterinary guide explaining how puppies grow, how to predict adult size from current weight, and when different dog breeds reach adult maturity.
Chicken Coop Size Guide: Square Footage, Run Space & Roost Dimensions
Complete poultry guide to chicken coop square footage, outdoor run space per bird, roosting perch length, and nesting box ratios for happy, healthy flocks.
Goat Gestation Period: Kidding Calendar, Stages & Doe Care
Learn goat gestation length by breed, month-by-month fetal milestones, pre-kidding CD&T vaccination schedules, dairy doe dry-off timing, and labor signs.
Sheep Gestation Period: Lambing Calendar, Stages & Ewe Care
Learn sheep gestation length by breed, pregnancy scanning milestones, late-gestation nutrition, pre-lambing CDT boosters, crutching, and lambing protocols.
How to Read Pet Food Labels: Guaranteed Analysis & Dry Matter Guide
Learn how to decode guaranteed analysis pet food labels, convert wet and dry food to dry matter basis (DMB), and calculate hidden carbohydrate percentages.
Onion & Garlic Toxicity in Dogs: Heinz Body Anemia Guide
Understand why onions, garlic, and allium powders cause hemolytic anemia in dogs. Learn toxic dose thresholds, symptom timelines, and emergency vet triage.
When Is It Too Hot to Walk Your Dog? Asphalt Paw Safety Guide
Discover how hot asphalt and sidewalk pavement get in the sun. Learn the 7-second bare hand test, paw pad burn treatments, and heatstroke prevention for dogs.
Aquarium Heater Size & Wattage Guide: Dual Heaters & Delta T
Learn how to size aquarium heaters by tank volume and room temperature delta. Discover why dual redundant heaters prevent fatal tank overheating.