"Bomb Bear"! How in hell did they get the bear to pack ammo? Mule pack saddle? Panniers? At least they didn't train the poor bugger to carry a shell into enemy lines and then detonate it. No wonder he drank in retirement - PTSD!
No training involved. The bear had been with the 22nd for a few years by this point, very well socialized and taken care of. When the excrement hit the rotating air pushers at Monte Cassino, he was left un-attended while everyone in the unit ran like banshees to feed the cannons. Wojtek simply did a case of "monkey see, monkey do" - or in this case "bear see, bear do" - got up on his hind legs, grabbed a 100lb crate of 25lb shells with his forepaws, and walked it up to the gunnery line and set it down by one of the guns. then trotted back to the ammo dump to repeat. He kept it up for several hours, without dropping a single crate.
The whole thing was witnessed by much of the unit, including officers, and several British officers in the area. Wojtek became a minor celebrity after that.
After the war, when the unit was de-mobbed in Scotland, his unit didn't have the heart to take him back to Poland and the, erm, "uncertainties" of the situation there with the new Soviet bosses, so they donated him to the Edinburgh zoo (a very kind thing to do, and probably brought a few tears to a few eyes).
He lived to a very healthy 21, passing away in 1963. Friendly and affable to the end, he was a frequent guest on the children's show "Blue Peter," and was visited by members of his unit numerous times over the years. The zoo staff would turn a blind eye, and allow the former comrades in arms to sit together in the enclosure and share a case of beer.
Monuments to Wojtek in Krakow and Edinburgh, respectively: