Honestly if there was a crossover between Squirrel and Hedgehog and Black Cat Detective, I think Uncle Gom would not attack Lǎobǎn (the one eared mouse) if he was just stealing some food. Uncle Gom seems to go after mice and weasels who are actively trying to harm the community.
The mice in the Weasel Unit are known as threats in episode one, but a somewhat sober Uncle Gom still allows the gift bearing mice to approach him in the middle of the night, and speak their part when they were not armed. He even seems to great them properly, if a bit harshly.
So if he saw Lǎobǎn sleeping or staggering around, looking like this
He probably would not see him as a threat. Maybe even give him some food and send him on his way, since at most he would be stealing food in the village, not attacking it.
Invariably, of course, showing mercy to outsiders like this would be treated as the wrong course of action for both shows. Mainly, because Lǎobǎn now knows the layout of whatever village or compound he ended up in, and since he is on the run, he is very likely to get picked up by the Weasel Unit, who would press him for information for safe passage if not straight up conscript him.
And conscription for Lǎobǎn would mean access to food and a fantastic way to get rid of his enemy, Black Cat Detective. Which would still make for an amazing AU.
Maybe most of the authorities in Flower Hill would simply arrest him as they do with known scouts, but assuming Black Cat comes from around the Rabbit Village area, an ally, he could easily convince Flower Hill that Lǎobǎn is a massive threat that needs to be shot on sight (for the crime of stealing food apparently. Or is it because he framed those children and took their mother hostage, which meant he was not repentant?)
Luckily I don't think Uncle Gom would be punished for having a sense of pity and kindness. In episode one some characters are beginning to whisper in pitying tones about his decline, and by his next appearance he appears to be the kindly laughingstock.
Although personally I think he just started to mellow out since he does not seem to be an alcoholic later in the series, so he isn't going around screaming threats at unseen enemies.
Or maybe, since he is no longer the sole protector of Squirrel Village, he is finally able to relax a little bit, and no longer needs alcohol to cope with the stress.
