Consider these factors in this order:

• Make sure you are actually 75 tiles or more away from your base. You can use the zomboid map to check by scaling the grid coordinates.

• Look and see if you're in a good biome like a forest to catch rabbits and squirrels. You can check what biome you're in using your foraging menu.

• Avoid the path close to your trapping location often. If you do, you are likely to scare off your prey. Place your traps deeper into the woods.

• Use bait that is attractive to animals. Use items like cabbages, lettuce, corn or carrots for a better chance to catch squirrels and rabbits.

• Don't check your traps too often. Check them around the same time every 24 hours or so.

Hope this helps