Stray Dog becoming attached

A little bit of context. On Halloween night I picked up 2 stray dogs running up and down my street. I have a reactive dog, so I put them in the backyard until I found their owners. I posted them everywhere I could. Use all the online tools at my disposal but nothing.

The dogs are are Border Collie and a Pug. They are besties. Together all the time, I mean I know they can only go so far in the backyard, but still they follow each other everywhere in that backyard never apart.

I go out everyday in the morning, to feed them, clean up after them and make sure the Collie hasn't gotten in to shit, because she does. They are jumpy but sweet dogs. This has been going on for over a week now. I feel bad for them, and so I go over and pet them give them some loving since they are stuck in the backyard. The problem is the Pug is becoming attached. He will now bark and paw at the backdoor constantly after I come inside.

I could bring him inside because my dog actually likes him, but I don't want to leave her alone out there. I don't want the pug to want to never go back to staying outside. Because right now at least they have each other and they play. So I feel bad and guilty all around. I already had a Border rescue come and see her and we are just waiting for a foster to become available. Which I hope is sooner than later because she is tearing my backyard apart. Between my husband and I we try to give them attention throughout the day but I think it's really backfiring. So what shall I do about the pug? should I just ignore him? I've read Pugs are super needy.

Any ideas and suggestions are appreciated.