I used injectable Baytril for the 10 yo that I put down the next heat. The other two I used Cephalexin, one was back to acting fine within 24/48 hours, she was younger and come from a different yard. She kind of went through a detox and was just unhealthy for a spell then pyo'd, then bounced back. Almost 2 years later no more pyo's and she's getting bred next heat.
The other bitch was around 8, I had bred her for the first time and she didn't get pregnant, instead got pyo. I used the Ceph, but after a few days I switched to Metronidazole she also never relapsed.
Oh and on the bitch I used Baytril with I also douched her daily with betadine solution, she actually liked it because it was hot outside and it cooled her. I didn't see any benefit of that and didn't do it to the other two. I didn't try the Lutalyse, but had it on hand in case I decided to use it as I've heard it works and I've read material to support that and my Vet agreed when I discussed it with him.
S_B