we take enough for the duration of our trip plus a few days extra. Backup plan (domestic US) is to refill at a local CVS. Backup plan (international) is have our pet sitter fedex us some of each color/shape/size from stash at home.

It is important to remember that not all drugs legal in one country are legal in another. Not all drugs requiring a prescription in one country require one in another country, and vice versa. It isn't always legal to ship drugs from one country to another by post Fed Ex or whoever.
It is up to you, the taker of those drugs, to check on the legality/availability of your prescription.
The information is available onlne.

It is up to you, the taker of those drugs, to check on the legality/availability of your prescription.
The information is available online.

Agreed.
If you pack the meds (legal Rx or otherwise) in coffee does that throw the scent off for sniffing dogs?

I have hardly ever even had prescription drugs to worry about, but like RoamsAround and others it has never crossed my mind to be concerned about this. I do sometimes travel with vitamins and herbal supplements, but no one at any point of entry into any country has ever even looked at them.

Well the new arrived and look just as depicted on Amazon. I bought two, figuring that would cover a two week trip with a couple days to spare. Have just finished loading them up for our early AM departure on Friday, and the two take up just slightly more room than the one week pop-top organizer I use at home. I am figuring that the numbering will serve as a cue as to whether or not I have taken that day's dose. Will report back post travel how they worked out.

Just over half way through the 15 day trip and the new pill organizers are working like a charm. Take up minimal space, and the numbered sections are a great way to keep track even when a bit jet lagged. Have not missed a dose yet.

You did not mention how long you will be gone, and it sounds like you really don't have to take too many pills with you. So this may be more information than you need.
First, I strongly agree that you should definitely take all of your drugs in carry-on luggage; never check them.
When we travel, usually for 4 weeks or so, my husband has to take about 18 prescription drugs and several supplements, and a CPap machine. The pills are counted out and put in flip top pill boxes before we leave. They are put in a separate carry-on with a large brightly labeled MEDICAL tag. They both . Both the CPap and the medical bag go through security and on to the plane with no problem and are accepted as a free carry-ons.
I need 3 prescription drugs and several supplements. I have two flip top pill cases, each of which holds two weeks worth, and one single week flip top for extras. I count them out and fill them before we leave. Yes it takes time to do that, but then we don't have to worry about it when we arrive.
We both put rubber bands across the flip tops and have never had a spillage, even when one of the flip tops came loose. They are flat when filled, and easily sit on the bottom of my carry-on tote or carry-on case.
We both take written prescriptions for all prescription drugs.
By the way, Spain is known to have some of the best medical care in Europe.
One other tip is to send a donation to IAMAT (https://www.iamat.org/) which provides the names of doctors all over the world who speak English and have voluntarily agreed to treat foreigners at the same cost they would treat locals. We just take the pages for the country we visit; only had to use it once, many years ago, and it was great.