
I've just answered another thread on AGs. We had one, our first Basset, who after repeated bouts of impacted/infected glands which wouldn't respond to treatment even after switching antibiotics, had this surgery. And as mentioned earlier, this is one I'd avoid at all costs. As I recall it was quite a nasty surgery, immediately afterwards because of the need to keep his stools soft!! Ouch.
He was better afterwards but we had another who years later started having repeated bouts of needing to be flushed and packed. Eventually both we and vet decided he'd probably be best having these out. Thankfully at the last moment, for reasons I never really understood, he improved and so we avoided the surgery.
These glands are scent glands and working as they should, expel just a little fluid with the passing of each normal stool (and yes, occasionally in a time of stress if pressed back there.... some of my bitches would manage to do this during a mating!!). Sometimes, during period of abnormal stools (diarrhoea, or the opposite) they can become clogged, and perhaps infected which is where a vet is needed to manually drain the glands and see what's going on. Flushing and packing with antibiotics is the best treatment (one of mine was treated with oral antibiotics which didn't work - new vet, and I knew this was pointless, but he insisted). This hound's AGs are sited quite far in, which is why I can't manually drain them myself - I don't go 'in', usually having been able to do this, if needed, from the outside. And if this starts to happen, it's usually a good idea to check diet, to normalise the stools so these glands, which shouldn't normally need to be touched, work as they should. Once drained manually, they will refill - they are not meant to be empty. And it's true that sometimes the more an owner messes around with these glands, the more they play up.