<human>: Condense the text into a few key points

Hi!  So in 2002, our family got two black cats from an adoption program called Stray Cat Blues.  They were part of the same litter, were 8 months old at the time, and are named Mocha and Latte (boy and girl).  They were very cuddly and friendly when we met them at the adoption center but as soon as they entered our home, they disappeared under the bed.  And... have stayed there.  

We think that they were abused in their foster homes and are psychologically damaged from their experiences from going from cage to cage to different foster homes.  Our vet thinks they were neutered/spayed too early and one has a kink in their tail as if it were shut in a door.

They come out at night and will let us pet them from an arm's length away.  They are very affectionate and seem to really enjoy the petting but approaching them anymore than that cause them to run/hide.  We cannot catch them to take them to the vet (the vet comes to our home), and we cannot cut their claws.

Although we have spent as much time with the cats as they will allow us to, we haven't really addressed that they still have not warmed us to us.  Does anyone have any suggestions on how we could help them adapt to being more like pets?  Anything is appreciated!
<bot>: Cats that we've had for 8 years are still unable to hang out with us like normal cats.  Were probably abused in foster homes.  Any suggestions?