Domesticated echidnas would be great. They could help keep ant populations in check.

I had a 3 month battle trying to keep meat (protein eating) ants out of my house last year. I eventually caved and had a professional pest controller spray a barrier around the perimeter of my house.

6 months later and the first signs of ant repopulation are starting to appear. I dislike having to use strong poisons as they are indiscriminate and we need to have healthy insect populations as part of the ecology (plant pollination, breakdown of dead organic matter etc).

One or two echidnas might have been able to deal with my ant problem in a few days. Maybe an echidna hire service (Uber for echnidnas?) could work.

Plus they are just plain cool animals to see walking around.