hello.my dog is chaising his tail.since 2days...

The causes which make dogs chasing their tails such as:
- obsessive depression
-presence of a dog in anarrow place
- insects in the tail
- feeling bored
treatment
- i advice you to make check of tail maybe there are insects which cause this case , and using ivomec ingection 
- if the tail is ok, then you can play with your dog every time try to be near to him to stop this bad habit
- if you can bring another female to your dog
- if there no improvment then you can give your dog , medicine of depression

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