Why does my Samoyed keep biting its tail?

Dogs bite their tails for many reasons, including play, skin disease, and parasite infection. A dog may treat its tail as a toy and chase it for fun, and when bored, lonely, or anxious it often does this – watch its mood and comfort it.

Tail biting can also mean the tail itches, from fungal, bacterial, or parasite infection. If the tail shows abnormal symptoms, treat it promptly.