Senior Greyhound - Needs Help

very new to this sub. I've recently acquired a senior greyhound from a neighbor who has been hospitalized. working on contacting local groups to get info on her age and health - however I am worried that she may be malnourished and very stressed. she's been with us less than 24 hours and is bone thin and begging for more food and I do not want to overfeed. Any tips? Should I be contacting a vet?

EDITED to add pictures. Thanks to all for the tips and advice! From what I can tell, she's about 11 and did several years of racing. hoping she is all good and that I am just a new (very paranoid) dog owner!

follow up question: should I be using a harness instead of clipping the leash directly to her collar? I did not see one at the owners house but am willing to buy whatever necessary to keep her comfy!

https://preview.redd.it/taukvtz1l55h1.jpg?width=2160&format=pjpg&auto=webp&s=d2218f4b4c33080bc54c23d5a2f439a3f52b5113

https://preview.redd.it/6vfdxdk2l55h1.jpg?width=2880&format=pjpg&auto=webp&s=07ee6279accaf5bf901fce870f19403e79c8777f

https://preview.redd.it/xuh41h24l55h1.jpg?width=2160&format=pjpg&auto=webp&s=013a8aa94253ba1a1376b98f11b0a9952bab3f8e

https://preview.redd.it/z5o467x5l55h1.jpg?width=2160&format=pjpg&auto=webp&s=77b511b82841ffa719ea18c4ecffeeccaf8d044d

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u/Top-Topic853 — 4 months ago