Hi Bloop45
Welcome to the Forum! Great to hear you have hedgehogs there.
Cats don’t normally bother hedgehogs, other than try to eat their food, so I wouldn’t worry too much about them. It’s possible if your pampas grass is so big, that there are other creatures living in there too which the cat might have found.
Brilliant that you are providing water. I would leave some out all day every day. At this time of year nursing mothers sometimes come out during the day time for a rest from the hoglets. Also, it’s often easier for hogs to find food in the wild than to find water, so useful to provide some , just in case a really thirsty hog comes out during the day. I have several watering places (wide but shallow plant saucers are ideal) and the birds also make good use of them! If you’re trying to make your garden more wildlife friendly, you might even consider a pond. Just make sure there is an easy place for hogs to get out.
There is some information about wildlife gardening here:
https://www.hedgehogstreet.org/help-hedgehogs/helpful-garden-features/
Just one other thing, if you are creating some new flower border (or even a pond) and need to remove some turf, you can put it into piles (upside down) and make a beetle bank as another feature of your wildlife garden.
Good luck and happy hog watching.
