Believe me, it is very hard on our furbabies. It is very painful procedure, especially LD just had some other things done. Poor baby.
I am so sorry LD has to go through this. I wish nobody has to experience this.
My Zack is half way through, he is going to have his treatment partII tomorrow ( I am very nervours about it). the reactions to the treatment are different, they all look very miserable after the treatment - they move very slowly, sometimes they trembling. my Zack had very bad appetite for 4 to 5 days - but I hand fed him Can food and home made chicken pasta. He could not walk to upstairs, so I slept on the floor for almost the whole month to make sure he is OK(Zack had terrible nose bleeds 2 weeks after the treatment - but it was not related to the treatment). But i think he actually feel much better after a week or so.
I am not really sure you should start next week, since he just be neutored(sp??)
But good luck with the treatment, I am really sorry for you and LD, I wish you dont have to go through this - but please keep me updated if you decide to go ahead (since he is so healthy). Oh,another thing, keep the room temperature cool and keep LD very quiet.
Here are some link, I really think it will help you to know what to expect. http://www.placervillevet.com/canine...ine%20symptoms http://www.vetinfo.com/dhwtreat.html...nd%20treatment http://www.golden-retriever.com/heartwrm.html

best wish and big hugs from us