How come certain animals aren’t as repulsed by some really disgusting odors or smells?

Question

Or are they affected but they have a higher tolerance before the smell overwhelms them?

In: Biology

Answer 1

They may have different smell or taste receptors.

For example, apparently birds don’t have a very strong sense of smell or taste- they can only detect very strong, almost noxious, odors. For this reason we put a special hot sauce on birdseed- squirrels actually flinch when they come near it (because they’re able to smell it more strongly) but the birds flock to it (it probably reads as spicy as a normal taco bell taco to them bc they can’t smell or taste much).

And what smells bad to one animal (like humans) might be interpreted by another animal’s brain (like dogs)in a different way.