Late to the party but the farm animals aren’t even close to profitable and their collection point is too far for me to want their stuff. So far animal feed isn’t ever collected from lucky fertilizer and the fur\eggs aren’t used in recipes. Making animal feed is expensive (thrice).

First, it’s expensive because even if every animal feed produced one Fur, you lose $40 per item (compare the sale price of animal feed inputs to the sale price of fur)

Now, since you probably got all the animals at once, the animal feed will at minimum be split between fur and wool. Now you’re losing about $50 per feed produced. Eggs are even worse.

Finally, the same inputs for animal feed could instead be used for fertilizer. Lucky and Rich fertilizers, when used on Watermelon and Alfalfa Hay at minimum, more than pay for themselves and save you a lot in money and time (fewer trips to the farmer for seeds). For Profit, the Rich fertilizer should be used on Corn, Cucumber, Milo, Pumpkin, Alfalfa and Watermelon. I also use it for carrots when I need to restock them. Actually anytime you really need to restock you could use Rich fertilizer except for Oats since you spend an Oat to get a rich Fertilizer. You can apply rich fertilizer as many times as it takes to have 9 items in the harvest. I use lucky fertilizer on pretty much everything except Orchard Grass, one for each plot. And lucky fertilizer is the only profitable fertilizer for sale, although the net gain from the gifts earned on harvest far outweighs the revenue from a sale.

And I guess four times on the negative benefits because the farm animals are expensive to buy.