Symbol:

Cat got your tongue? (wishing you'd said something you didn't have the courage to; since they're left behind, wish you'd said/done something as a child about your situation)

Let the cat out of the bag (tell something/told a secret you wish you hadn't)

"litter" of kittens (feeling useless, helpless, worthless, etc.-less :-)

"stray" (and "Stray Cat Strut") (maybe not doing things "right" then, stray from how you should have been/grown or, if you like the song, "Stray Cat Strut" maybe they have a character, an independence you wish you had)

"Don't have kittens!" (being overly excited/upset)

One's house usually is our "selves"/representation and dreaming about an actual former house, about our life during that period of time we lived in that house.

That you returned, means they (presumably) won't stay there, will no longer be abandoned? Maybe it's yourself telling yourself to go back and get what you left there, some part of you/your personality/desires, etc. that you weren't able to take with you as you grew up (I'm thinking "Puff the Magic Dragon" here :-) not realizing it wasn't "optional" and that you'd need it when you grew up (creativity, child-like faith/trust, viewpoint, etc.)