There are a number of disorders which can cause hair loss in dogs, but the most likely of them would be mange. This can be treated fairly easily, but you need to take your dog to the vet as soon as possible as mange is very contagious to other dogs and cats.
Could be mange
this is probably demodectic mange, a mite problem for young dogs with weak immune system. Treatable. Talk to your vet.
Tenex is a blood pressure medicine and has not been shown to cause weight loss. Just the opposite, it has been known to cause weight gain.
The only way tobacco can cause weight loss is if you chain smoke & don't eat.
An over active thyroid can cause weight loss an underactive thyroid can cause weight gain
Yes, it can also cause weight gain. Weight loss could be Lyme, or a co-infection such as Babesia.
It does
No.
No.
Yes, rapid weight loss can cause adrenal fatigue. It can be extremely dangerous.
micropill can cause gain weight