Jennifer, welcome. I'm in the Tripawds Chat room for a bit if you want to talk.

I'm sorry about Barney's diagnosis. Why did the vets feel he wouldn't do well on three legs?

Based on what other members have experienced with their dogs going through chemo, it does sound like nausea. Did the oncologist give you an anti-nausesa medication like Cerenia? If not, get one asap today and my bet is that he will start to feel better quickly.

About signs of mets.... you know, there are so many things that we assume are signs that the cancer has returned. It can drive you CRAZY. Most times whatever symptoms our pets are presenting are something totally unrelated to the cancer and usually not serious, and treatable. Try not to worry. It sounds like Barney is just tired from the chemo and feeling pretty crappy. Most dogs don't get these symptoms but is sounds like Barney might be. I'm sorry! 

 Also would like to find out from others how much time (quality time) they were able to get with a similar situations of osteosarcoma mets to lymph nodes.

Another tip: try not to focus on amounts of time but rather how you spend that time together. Every day is a gift when you're dealing with cancer and we must try hard to remember that our pets don't keep track of time. They just want every moment to count and be happy with their favorite people. It sounds cliche but it's so true. Barney is his own dog and he lives life on his own timeline. Do your best not to compare and you will find much more peace throughout this journey. In turn, you will make Barney's days the best they can be.

I hope this helps! Be sure to hop over to Jerry's Required Reading List for more tips, and stay tuned for others to chime in shortly.