Broad spectrum antibiotics over the counter

[kdim71]

Im going to be attempting to drain my chickens water belly. I am looking for an antibiotic name that is broad spectrum over the counter antibiotic i can purchase. Also dosage. She has been to the vet and diagnosed with it. She has been drained once and given an antibiotic from the vet. Advise from people that have done this themselves appriciated. Thank you in advance.

 

[Eggcessive]

What antibiotic has the vet ordered in the past?

 

[kdim71]

What antibiotic has the vet ordered in the past?

It didnt have a name on it but it was pink thicker liquid that i had to use a plunger style medicine dispensor im sorry im not sure what they are called. I looked at the lable mutiple times no name on it brown bottle if that helps