Thanks for the replies all
Thorin is getting 1 dose of heartguard and Nookie is getting a specific Chinese Herb combination to kill the parasites and control seizures. Hopefully they all work. It's the yard I'm really concerned about. Everything I have read said they pretty impossible to kill once in the soil, so I think it will be as you said, Hazel, just trying to control the infestations more than ridding it
Patti, they are deworming Thorin just in case. His immune system is low right now from the chemo. But he only has 1 treatment left