переделал переключение в "Возраст питомца"

assets/js/gp-form.js

@@ -156,3 +156,30 @@ function listInputRadio(main ,item, textClass, input, content, block) {
         })
     })
 }
+
+remoteControl('.form-input__remote-control', '.form-input-tabs__button');
+
+function remoteControl(main, button) {
+    let mains = document.querySelectorAll(main);
+
+    mains.forEach(main => {
+        let subjectClass = main.dataset.content,
+            subject  = document.querySelector(`.${subjectClass}`),
+            buttons = Array.from(main.querySelectorAll(button));
+
+            
+
+        main.addEventListener('mousedown', function (eventMain) {
+            setTimeout(() => {
+                let indexActive = buttons.findIndex((button, index) => {
+                    if (button.classList.contains('active')) {
+                        return true;
+                    }
+                });                
+
+                subject.querySelector('.active').classList.remove('active');
+                subject.children[indexActive].classList.add('active');
+            }, 0);
+        })
+    })
+}