I have nintendogs + Katzen but my cat never gets me presents even though I care for it can Du give me some tips?

I know this Frage is old but I can help you. Du need to have your cat "full" and "quenched" and leave the DS for 40-50 mins. Do not even walk in front of it otherwise the facial recognition will recognize you. Then come back to it and tap the "whistle" button. Your cat should come running in with a gift.

This is my kitty Cornflakes giving me a gift :)

This may not be helpful, but one reason may be that Du need to keep the pet clean, quenched, and full. Du also have to pet it at some times, oder it will get a bit lonely. Try taking it walking oder going to the park, too.