I didn’t actually, I entered the conversation with my avatar character who had the cat summon. The pet pal in my party is Lohse, though sometimes, when I’ve already started a conversation with my avatar, animals can speak via Lohse as sort’ve a single player shared skills system. The same happens when I identify objects, Lohse has loremaster but my avatar can still identify loremaster 1 artifacts because she shares the skill with the party. That said I will give it a go. I also tweeted at Swen Vincke, the founder of Larian Studios, with the same question and he said there wasn’t a cat upgrade so I’m not sure but I will try again anyway.