My pup isn't feeling well. Eats very little and drinks. Has very little energy. Pooped yesterday and it was mucousy and stunk. Can I give him some penicillan to see if would help. I have pills 250mg but if I can I'm just not sure how much to give him. He's 4mths and weights like 3-5 pounds

Do not medicate your dog with human grade penicillan. Antibiotics for Working Terriers (http://www.terrierman.com/antibiotics.htm) I would recommend a trip to the vet, this could be many things where peniciian is not recommended

I agree a trip t the vet is best. Without knowing the problem giving any medication (especially human meds) you may be making matters worse and cause gastric upset or allergic reaction.

I believe that you shouldn't give your dog pencillin for one reson its like giving your dog your full human set dinner first take the poor thing to the vet then to the theripist to see what or how the dog feels

Vet! That's your only option.

Giving human medication to your dog, especially since you have no idea why he's ill, will likely kill him!

Vet! That's what you can do. That's all you should do. Keep the pills in the bottle. Do not give them to your poor dog.

i believe that you shouldnt give your dog pencillin for one reson its like giving your dog your full human set dinner first take the poor thing to the vet then to the theripist to see what or how the dog feels

What? You want the dog to see a therapist?