Easy answers are always easiest to write.

Regarding relations with animals commonly called bears, deer, dogs, cats, birds, etc. there are no boundaries. Let them fly, swim, crawl anywhere they want to include sitting on your head.

Regarding relations with humans commonly called white, black, yellow, green, pink, male, female, its, they, them, and those, there are definitely boundaries. The first and best boundary is to go off planet to live. The moon over earth, the sun, anyplace to include a floating garbage can is the best boundary.

Since most are unable go off planet then other boundaries must be made. So in simple order, the following.

1. Build a concrete wall twenty feet tall surrounding what you call home. Atop the wall embed shards of broken glass, steel spikes, rusty razor wire or anything that deters all but the most tenacious human from crossing.
2. In case the wall is breached then place claymore mines just inside the perimeter. Make sure you spray the explosive side with paint, preferably orange just in case a trespassing human enters and switches placement of the mine.
3. If the wall and mines do not deter the humans then depending on size of home and land home is on there are options of a water filled mote full of toxic sludge and mutant crocodiles. (mutant crocodiles can be purchased from Russia) Or if you don’t want a mote you might consider automatic machine guns or lasers. These can be operated by robots programmed to destroy any human while allowing bears, deer, dogs, cats, birds, etc. to enter.
4. If every boundary fails and you are over run by humans then as a last resort detonate a small nuclear suitcase devise (currently available for purchase from Iran)
5. After detonation you will no longer have to worry about anything other than dimension 13. Dimenstion 13 is a bitch and you don’t want to know about boundaries there.