animated series about boy on the farm

That leaves:

The Shnookums and Meat Funny Cartoon Show

Some of these are far less likely than others. It's on a farm?  Gargoyles and Mighty Ducks were mostly based in cities, with a few backdrops of fantasy and sci-fi (respectively). Bonkers and Shnookums and Meat were also set in a city. Hercules (the character) grew up on a farm, but I don't think he visited it much on the show. Aladdin was mostly in a desert. The only farm I remember on the Disney seasons of Doug was one of those weird fast food places the gang tried out in the first episode. Timon and Puumba went all over the place, but the scenario described wouldn't really fit the show. They actually did go to a farm in at least one episode, but nothing like that happened.

If it's a Disney Afternoon show, I think it's probably 101 Dalmatians or Gummi Bears, leaning more towards the latter. Besides the process of elimination, both shows had farms on them (it was actually the main setting for the former), human characters were around (in the case of Gummi Bears, one-episode human characters were introduced all the time to move the plot forward, I could totally see our farm boy being one of them), and that scenario wouldn't really be out of place (less so with Gummi Bears).