His poop is back to normal now and he is eating well. He is off the antibiotics. Do you think I still need to call my vet? I called him before I started the ulcergard to let him know what was going on and if I could give the ulcergard while giving the antibiotics. He said yes and has seen him since then to take his cast off. He spent the night at the vets the, too. This was just this weekend. What signs should I loom for? 

Sorry I didn't read through all of that! If his manure is back to normal and he is eating normal you should be alright. Always need to be cautious with antibiotics

Thank you so much for replying! I actually never heard of that and I am really glad you brought it up. It's something we should all be aware of.