Overview
Unlike humans, dogs and cats cannot synthesize vitamin D from sunlight — studies confirm that puppies develop rickets even with UV exposure if their diet lacks vitamin D. This means every microgram must come from food. Vitamin D controls calcium and phosphorus absorption; without it, bones become soft and bendable. Rickets is most common in growing pets fed unbalanced homemade diets or all-meat diets without organ meats.
Symptoms to Watch For
- Bowed or bent legs in puppies/kittens
- Reluctance to move or play
- Bone pain when touched
- Stiff, abnormal gait
- Stunted growth and enlarged joints
How Nutrition Helps
Prevention is simple: feed a complete, balanced commercial diet that meets AAFCO standards. For those feeding homemade diets, vitamin D supplementation under veterinary guidance is essential. The richest natural sources are fatty fish, liver, and egg yolks. But be careful — vitamin D toxicity is dangerous and can cause kidney failure, so never supplement without veterinary supervision.
How Activity Helps
Gentle activity promotes bone development, but puppies with rickets should avoid high-impact exercise until bones strengthen with dietary correction.
Prevention Tips
- Feed AAFCO-compliant commercial diets
- Never feed all-meat diets without supplementation
- Consult a veterinary nutritionist for homemade diets
- Never supplement vitamin D without vet guidance — toxicity is dangerous
- Include organ meats if feeding raw or homemade
Breeds at Higher Risk
Any breed fed an unbalanced diet. Hereditary vitamin D-resistant rickets has been documented in Pomeranians and certain cat breeds.