Is this plant ok?

[pikkos]

My marginata is free in the garden and there are a lot of plant/weeds there... that one in pics is the most attractive for her and i saw it a lot of times went and ate that ! Is it ok for her?

 

[Iochroma]

It looks like Carissa - "Natal plum" - the fruit is edible, but the foliage should be considered toxic.
To be fair, there are no records of poisoning incidents in my references, but out of an abundance of caution, I would not use it in animal enclosures.