What if I told you that you can go ahead and have pets, have kids, and even use straws without climate guilt--because those are all red herrings to distract you from the fact that the actual #1, unavoidable, absolutely essential thing we need to do is STOP USING FOSSIL FUELS.
Consumer activism & these individual sacrifices are a shell game! Channel all that climate-angst you feel towards ACTUAL SOCIETAL CHANGE. Pressure politicians and corporations. Hold them accountable. Organize. Join a climate group. Participate in climate activism.
And yes, stopping using fossil fuels will require a total reordering of society and probably the end of capitalism itself. But let's be real that that's what it'll take. You having or not having a dog is not a salient factor in whether or not we solve climate change.