You have an armadillo issue. Is there an effective natural armadillo repellent which you can purchase to eliminate them? Or an unnatural product will do too. Anything to make them stop digging! Perhaps some machine, some device like a high-pitch audio machine which will keep the dillos at bay? Let us examine some of the repellents sold on the market:
Mothballs - Yes, this item is chemically called naphthalene, and is sold in ball form and flake form. Many manufacturers sell mothball flakes as an overall animal repellent. The concept is that the mothballs smell bad, so the animal will keep away from them.
Coyote Urine - The concept is that a creature will get scared if it smells the odor of a large, terrifying predator, and it'll keep away from the area where the urine is used. This is sold in powder or liquid form, occasionally mixed with mothballs.
Castor Oil - The strategy here is that armadillos dig in the ground for worms and grubs, and a lawn loaded with castor oil isn't as great to dig , and the oil will eliminate the grubs.
High-Pitch Sound Machine - The concept is that the high-pitch noise is annoying to armadillos, and they won't need to go near it.
In nearly half of the armadillo instances that I take on, the client has already bought all type of magic "armadillo-b-gone" or "armadillo-away" kind repellents. These repellents are often comprised of naphthalene (moth balls) or predator urine (fox or coyote) or castor oil as mentioned above. Or some folks buy those high-pitch sound machines, which are so useless the FTC has formally labeled them as a whole, fraudulent products. I have personally observed dozens of instances where customers have loaded their lawns with these types of gimmicks, or even poured whole boxes of mothballs or bleach armadillo burrows (NOT great for the environment). Also it doesn't impact the armadillo's behavior one bit. In summary, I am saying to you that there's no such thing as a successful armadillo repellent, sadly. If you do not believe me, go ahead and try a few. Any success you encounter at keeping armadillos away however, will be purely coincidental.
There is a relatively cheap and quick solution. Trap the armadillos in live traps, and then relocate them far away from your property. That is the only effective armadillo hindrance on the market. It works, and works really well. Basically, you just have to place a large sturdy cage trap on the armadillo's route, or even right over the burrow. Make sure it's flush with the ground and does not rattle.