In reading the story about the manna, we see the following (all are in Shemot (Ex.) 16, so I'll just mention the verses:
verse 12 G-d says that in the evening they will eat meat and in the morning be satiated with bread.
verse 22 People collect a double portion on the 6th day; the elders wonder what's happening. It mentions that they took a double portion of man (implied by usage of the term "bread" in the verse.) Did they take a double portion of quail, too? (Not something apparent in the verse.)
verse 23 In explaining things, Moses speaks in general terms by saying cook and bake today, and leave the left-over for tomorrow. He doesn't mention specifically the word "man". So is this commandment general meaning that he implied cooking the quail as well, since there would be none of that the next day?
verse 27 some people go out to gather. The verse does not say WHAT they were looking to gather. It seems to be just mahn, but, perhaps, quail was implied, as well?
[verse 29] Moses says, don't go out on Shabbat. He also says that this is why on the 6th day G-d gave a double portion of bread.
My analysis: It looks like there was no double portion of quail given on the sixth day, as there are a few verses that mention that the double portion was of mahn, only. However, what doesn't seem clear is if on Shabbat, they had meat (quail) at all, or they had to make the 6th day's portion of quail last through Shabbat or not eat any quail at all on Shabbat. (There is no implication anywhere on how much quail they could gather each day, or that the quail would spoil by leaving it over to the next day.)