My last dog I had (before having our staffie) was an Anatolian Shepherd,she passed on a couple of years ago,but she is still in our hearts,and minds,in fact she is with us always spiritually/and bodily as we had her remains sent to us in a beautiful urn,and she is placed on the window sil in the lounge,
The urn is in a lovely box covered with dried wild flowers,with her name plate on it,with the words,safely passed on over to Rainbow Bridge.

When our lovely staffie passes on the urn and our loving staffie will be buried together in our garden.
Yes,I believe there is a heaven across the Rainbow Bridge for our beloved animals.