I have a 5 week old goat and a 3 week old goat someone gave to me they had a little cough when i got them found out they did not get to nurse mom she had no milk. So they put them on cows milk. I gave colostrum supplement and electrolytes. The cough got better for a few days almost went away now it is back a worse is is a real congested sound and choking sound. I have not taken a temp. All i have is penicillin in an injection form can I use this for them. I am very worried about them the older one is worse. They are Spanish/alpine cross and weight probable 10-15 lbs. I wont have money to take them to the vet for almost a week.