I was never able to indoor potty train with poop. I wish I had posted about it because you have great advice here! I just accepted taking him out for poop, but he wasnít regularly eating it. Once he ate another dogís poop - I thought he was holding bark/mulch and about died. I hope that makes you feel better
I didnít even handle it well, I completely overreacted!
Itís hard when you canít track his poop schedule. Ours also held it and would ONLY poop on grass. It took a long time for me to figure out that one. The other trouble we had was that our puppy took multiple poops. Sometimes he would poop outside and come in and poop a bit more. Once I realized that it helped because I knew to have him poop twice before taking him back in.
I had to keep mine very focused on potty by controlling where he went and taking him back inside if he didnít poop right away. Always on leash or he would run around like it was playtime. I also had to back up with potty training several times because of poop. He was pee trained long before he was pooped trained, and then one day he started marking and I was SO confused because it looked like he was peeing, he never lifted a leg! All of the containment advice is what worked for us, and it did work so donít give up hope - itís not over yet
I never took him on walks to get him to poop because he was too excited and would clearly forget why he was outside. We did take him on walks after he pooped for a while, but we took him back inside and out through a different door to distinguish play time from poop time. It might have been overkill but Iíll do it again with my next puppy because it worked for us. He goes potty very quickly on command.
Our puppy also had anal gland issues that have resolved, he hasnít had trouble with them in 6 months. I think it was a combination of diet, physical maturity, anxiety, and heartgard giving him diarrhea for at least a week of every month. Poop accidents were always a sign that he needed his glands checked. We never had them emptied on a schedule, but took him to the vet and he did need them emptied about every month or so for a while, which gradually decreased. The vet taught my husband to do it but not his favorite thing so he only did in a few times, I usually took him in. It sounds like you already checked with your vet, but something to consider if his poop isnít pretty firm and heís having accidents.
While youíre figuring this out, it might really help for you to find someone you can leave him with. Itís really hard to be glued to the house, even if itís temporary. We had good luck with the dog sitting/walking/boarding apps, but the more reliable users tend to charge more and are often booked in my area so i do have to plan ahead.