Keep in mind the pandemic is driving demand for fur companions up, and basic supply-and-demand law shows that price will go up assuming supply stays the same.
There's the possibility they have people lined up or believe people pay this much and value their puppies at that. So, don't walk away 100%. You have time on your side, so you can pause the process to address your concern.
I would third-party (pass the blame) and good-cop/bad-cop (show that your on their side, empathy), and tell a story (people love a good story):
"["My husband" or his name] is a bit of a numbers guy and I adore the thought of bringing home one of your furbabies to our family. We obviously have to make decisions together. He said it's too far out of the budget and I'm worried he'll tell me to keep looking and I'm trying my best to convince him that we should not walk away since we're this far already.
Is there any room to bring the price down?"
That's a pretty genuine, inoffensive, and authentic story to start. See what they say. If your uncomfortable during the conversation "Let me gather this information, see what he says, and hopefully get back to you with some good news" to slow down the process. You're just the messenger over the phone or via text. You don't need to volunteer any information right away because you don't know for sure. You know their price, but aren't feeling it. You are on their side, and your significant other is being the bad guy. Your hoping they can help you out so you can get back with good news with a follow up text. Everyone loves good news. "Good news, my husband said _", or don't. Maybe have another round of offer/counter-offer.
I don't know what kind of margins a breeder works with or if they will say they have people lined up to pay that price (maybe they do, maybe they don't).
Where's the "win" for you? Maybe they'll help you out, maybe they won't, but you've asked. You're on their side. You just have some concerns that your hoping they can address to sell your husband on the price (who is actually you, if that makes sense).
My exact words more blunt when I asked, "$2500 is a little steep, is there any wiggle room on price?" Knowing I was 100% already telling myself I would pull the trigger, but just hoping for any discount.
Thats kind of long winded and repetitious, but there's a mindset I'm hoping you caught and need a place to start thinking and/or words to say.