Should I travel to Vietnam on my visa expiration date and wait to apply for my education visa, or extend my current visa?

So i've got another question. Would you guys advise me to travel Vietnam on Saturday, the day my visa expires, and wait until Tuesday to apply for my education visa? Or apply for a 30 day extension at Chaengwattana and risk making it harder to get an education visa at a later date due to having 3 back to back fly in stamps? The reason I'm a bit stressed about this is because I brought my cats with me from Shanghai, and if i get denied entry, that would be a major problem for me. Again, thanks for any advice. Thanks.