Hi there! I see you're having trouble logging into your Petco account and are encountering a "too many redirects" error. I can definitely help you with that!

This issue usually indicates that there's a problem with how your browser is trying to interact with the website. Let’s go through a few steps to resolve it:

1. Clear Your Browser Cache and Cookies: Sometimes, old data can cause issues. Here’s how to do it on your iPhone:
- Open Settings.
- Scroll down and tap on Safari (assuming you're using Safari).
- Scroll down and select Clear History and Website Data. This will remove your browsing history and cookies.

2. Try Incognito Mode: This mode runs independently of your regular browser settings and may help you log in:
- Open Safari and tap the Tabs button (two overlapping squares).
- Tap on Private to enter private browsing mode.
- Attempt to log in to your Petco account again.

3. Disable Any VPN or Proxy: If you’re using a VPN or proxy settings, it might interfere with the login process. Disable those temporarily.

4. Check for Browser Updates: Make sure your Safari browser is updated. Go back to Settings, then tap General > Software Update to check.

Let me know if these steps help you log in, or if the problem persists, we can look into more advanced options! Are you satisfied with the solutions I've provided so far?