The biggest predator of sedum is slugs.
Sedum Acre can be pulled back and plant something that is more aggressive where you don't want the sedum.
Small amounts will cause a stomach ache but call your vet.
Mostly it's the creeping sedums that are edible, but before testing them willynilly, note that a very few sedums are mildly toxic, such as Goldmoss Sedum (S. acre aurea), & can cause stomach upset if too much is eaten raw.
They seem to leave Autumn Joy sedum alone but will eat Xenox sedum.
Sedum sieboldii was created in 1839.
Sedum ternatum was created in 1803.
Sedum oblanceolatum was created in 1975.
Sedum dendroideum was created in 1828.
Sedum albomarginatum was created in 1975.
Sedum caeruleum was created in 1771.
Sedum sexangulare was created in 1753.
You plant red sedum in well drained soil in a sunny location. The roots are not very deep.