For excessive loss of hair the reason will be either dandruff or any parasitic infestation or bacterial infection of the skin, if ur pet doesn't have any of this still loosing hair means then better to get a vet consultation
Before bath, he was well and good. These symptoms are from 2 days only.3 days back we took a grooming session from kuddle. No loss of appetite and he is active. Shaking of head is maximum at early morning
You can give this syrup called nutricoat advance or soft coat 8-9 ml twice daily if he/she is around 30-35kg body weight for 1-2 months depending improvement