My two moggies keep peeing on my dogs beds and it is becoming a big problem does any one know why this could be ?

Oh dear... naughty moggies.. are they trying to oust your dogs out..ha!

If I were you I'd wash the dogs bedding in bio washing powder as that will get rid of the wee scent normal washing powder doesn't..... are you able to put a litter tray next to the bed.. or do you have an already used litter tray... not nice but put some of the USED litter on top of the new cleaned out tray and they should smell their own wee wee scent..

Thats all the advice I know of, I am sure others will have more tips.. fingers crossed it will work out for you

Thids is the problem i could understand if they didnt have litter trays but they do and have always had them they spend all day outside and come home at night and.thyre both females !

I think they are trying to own the dog bed.. try Bio washing powder... it will stop the scent which the cats are picking up on.. or better still as it is a big problem get a new bed and stop cats getting in the dogs room if thats possible.